The Top 15 Network Protocols and Ports Explained // FTP, SSH, DNS, DHCP, HTTP, SMTP, TCP/IP

pretty easy, straightforward stuff; learned all this in the 90s and thankfully have retained most of it. Thank you for the review. Memorizing really obscure stuff like HSRP using port udp 1985 was fun too.

Don't forget snmp runs on 162 as well when utilizing traps

Not gonna lie. Totally underrated video. Definitely going to recommend this to the study group I'm running.
Keep up the good work

pickupline nobody gets, I am so nerd, that at the end of my date, I ask my girl for TFTP.

TFTP is UDP correct?

Excellent explanation Chris!!

Chris the great.Amazing topics as well, if i buy your course i found all of these?

this is so interesting! Ishould be coding for my work...instead I'm watching these things called packets fly around. 😲

Tnx for the lecture. Just stumbled to it and find your style really calm and clear

Straight to the point - thank you.

Thanks

Today in class we needed to look at a SMTP and a POP3 file in wireshark, and I asked if SMTP can be encrypted. They said no. Argh, so frustrating to hear that it can be, after all.

Vsftpd 2.3.4 😬 😬

one word enough. perfect

I love too watch more but i got to up in the morning to prepare for my ccna which is on the 1/2/2023...man i learn so much from you bro....

Damm this was fun thank you Chris

Im studying social work. Im amazed at how much variety there is between all the IT stuff things. I was watching some coders, some linux guy, then someone who does malware analysis (john hammond, please subscribe) and now you, showing me a glimpse into networking stuff. I didnt know there would be so much variety. Also I wish that my professors would be at least half as cool as you tech guys explaining stuff.

Hey Chris, thank you so much for your amazing videos.

Great video. Thanks Chris!

Great content - simple to understand, but yet lots of good information !

dns:53, dns over tls:853

I have another question ,please if we tftp uses udp why we see the client makes an ack for the packet ?

love the video chris , can I ask if u can do a deepdive into dns so we see the headers and the flags and how they are used in ddos and dns recursive flood , thanks for sharing

this was great. subbed

Nice and thanks

Thanks for informative video Chris!

Interesting and very clear video.
But I wonder why you should have to KNOW all them port numbers.
I feel it makes more sense to understand the purpose and global working of the protocol. The details are easy to find.
The port number is very useful, of course, but easy to look up.
Or do they ask you at exams "What is the port number for FTP?"

Thank you so much Chris.Very informative video!!!Great explanation,love it!!!

Incredible lecture! I’ve been studying this information for months and having trouble retaining it, until now. Thanks!

Please help... If DHCP 'gives' a computer an ip address... what does it mean to give an 'address to an address'. This seems like sending a letter to someone's address and contained within the letter is an address?? How can the 'new dhcp address' reach the address if there is no address??

I love the tests that you gave as you introduced each different protocol -- very entertaining!

Chris, another great video! Where could one purchase a packethead T-shirt?

Hi Chris,like from Kyrgyzstan 👍

Oh heck ya!! This video is an excellent review of ports and protocols as a NOOB, but I’m also going to use it to get more comfortable with Wireshark. Thanks Chris!

Sir am using andrind phone i don't have laptop, what should i do, please help me out in my career.

Chris, amazing video and also the conversation with David Bombal. I have a workshop coming up that I would love for you to present at in San Juan, Puerto Rico. If interested, please reply and we can discuss. The workshop is in May with the Department of Homeland Security. Thanks

Hey Chris Greer from where u learn this

put translation options in the subtitles please, Chis. thanks

Amazing information

Hello Mr Chris , am kindly asking where can I get some the trace files you captured for the different kinds of attacks on you device . I would like to go through them for my own understanding.

This is such a badass channel! Always great explanations and real world examples and with a pcap file attached! Thank you Chris for always providing great FREE training.

awesome work man keep doing these please!! i need the knowledge.

Your fans from India 🇮🇳 ♥

that was realy informative thx dear chris good bless u

Quick question:
is it possible that a clients generates 0 length packets with the same sequence and next sequence number?